Folding storage box



FIG. 1 is a front view of a folding storage box in a closed configuration, showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is a perspective view of a folding storage box in an open configuration; and,

FIG. 9 is a perspective view of a folding storage box in another open configuration. 

CLAIM The ornamental design for a folding storage box, as shown and described. 